New derivative of 2.5-diamino-1.4-benzoquinone



Patented Sept. 15, 1942 UNIT-ED STATES PATENT OFFICE NEW DERIVATIVE OF2.5-DIAMINO-L4- BENZOQUINONE Gerhard Langbein, Hofheim in Taunus,Germany, assignor to General Aniline & Film Corporation, a corporationof Delaware No Drawing. Original application November 29,

1938, Serial No. 242,919. Divided and this application August 16, 1941,Serial No. 407,236. In Germany December 4, 19-37 1 Claim. (01. 260-315)The present invention relates to a new clesuction, while hot, and washedwith alcohol.

rivative of 2.5-diamino-1.4-benzoquin0ne, more It dissolves in water toa brown solution and particularly it relates to the compound obtaindyeschromed cotton current tints. It has the able by condensing2-n-butoxy-5-(N-ethyl-carfollowing probable constitution:

bazolyl 3' amino) -3.6-dichloro-1.4-benzoqui- 8020B none with5-amino-3-sulfo-2-hydroxy-flaenzoic 5 01 acid, for instance in the formof its sodium salt. HN OH The condensation is preferably performed byheating the components in a diluent, such as O: @0011 an organic solventand, if desired, in the presence 10 i I of an acid binding agent.

This application is a division of application I laim, a a Serial No.242,919, filed November 29, 1938, Patent 2 e compound of the formula2,267,741.

The following example serves to illustrate the 802013 01 invention, butit is not intended to limit it In I I thereto; the parts are by weight:O OH A mixture of 45.7 parts of 2-n-butoxy-5-(N- ethyl carbazolyl3'-amino)-3.6-dich1oro-1.4- O: NH COOK benzoquinone, 1000 parts ofalcohol, a solution of 27 parts of 5-amino-3-sulfo-2-hydroxybenzoic acidneutralized by means of sodium carbonate being W D d Which dy s o d and10 parts of sodium acetate is heated to cotton Current tintsboiling,while stirring for one hour. The solid ERHARD A GBEIN.

brown condensation product is filtered with 25

